Question

how do you find out if a fraction is proportional i know proportional are numbers that can be divided evenly such as 30 , 50 but i dont know with fractions

Answer 1

There's basically two ways to do it. Piggybacking from what @raffle_snaffle posted, suppose you had two fractions:

\[\frac{4}{16} = \frac{2}{8}\]

Answer 2

Then you can either cross multiply to get:

32 = 32

Answer 3

Or you can reduce both fractions and observe that they both reduce to 1/4

Answer 4

i understand but what if it is a mixed number like 6 1/4

Answer 5

In order to find out if two fractions are proportional to each other, you need TWO fractions.

Answer 6

6 + 1/4 is only one fraction

Answer 7

ok other ones 8 1/2

Answer 8

So you basically do the same thing

6 + 1/4 = 8 + 1/2

1/4 - 1/2 = 8 - 6
1/4 - 2/4 = 2
-1/4 = 2
-1 = 8

False

Answer 9

If you have any questions about how I did that, let me know

Answer 10

Two fractions that are proportional to each other will always be equal. If they are not equal, then they are not proportional.

Answer 11

ok thanks il observe this a bit

Answer 12

Just let me know if you have any questions. I expect you to have a few.

Answer 13

ok il try one on my own and see how i do here

Answer 14

Can you post it here please so that I know what you are working on?

Answer 15

You can still do it on your own and we can discuss it afterward

Answer 16

6 1/4 and 7 1/5
1/4 - 1/5=1/20
7 - 6 =1
so 1/20 and 1 are not proportional so no however that last part u did its out of nowhere so i didnt do it (-1 =8)

Answer 17

ok i think u divided

Answer 18

Make sure you do it this way:

First set the fractions equal to each other. That's the first step

Answer 19

When you finish, you need to have an integer on one side and an integer on the other side.

Answer 20

The last step is to cross multiply

Answer 21

6 1/4 = 7 1/5

1/5 - 1/4 = 7 - 6
1/20 = 1

Cross multiply
1 = 20

False

Answer 22

Do you get it now?

Answer 23

yep thank u

Answer 24

Hang on a minute. Let me find one for you to do

Answer 25

Nevermind, I think you get the hang of it. But chances are if the whole numbers are different, then they will not be equal. For example

3 + 4/7 = 3 + 8/14

That is proportional because

3 - 3 = 8/14 - 4/7
0 = 8/14 - 8/14
0 = 0

Answer 26

But

4 + 1/4 = 5 + 3/4

That is not proportional

Answer 27

hah ok thanks for the help